republican new jersey governor and romney supporter chris christie repeatedly praised the president's performance and his compassion. >> you're go it to be okay. everybody is safe. >> reporter: today, mr. obama was back in campaign mode, deriding governor romney's eromise to bring change to washington. >> another $5 trillion tax cut that favors the wealthy isn't change. >> no! >> turning medicare into a voucher is change, but we don't want that change. oveeporter: the president's iveedule over the next five days tells you a lot about his mpaiaign strategy. he'll be spending a great deal of time in ohio and wisconsin, trying to build a midwest firewall to prevent governor romney, scott, from getting 270 electoral votes. >> pelley: well, nancy, governor eymney went hunting for votes today in another swing state, virginia. snd jan crawford is covering his campaign. mp we really can't have four more years like the last four re ys. i know the-- the obama folks are chanting four more years, four fre years. rut our chant is this-- five more days. >> reporter: at a rally in virginia, a campai